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embryo is different for both, both have similarities. The biggest difference however, is that the allantois develops as a membrane to surround the embryo in reptiles like this dinosaur, while in humans it develops to form the placenta. This

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Jordan~ an animal whose embryo develops in an amnion and chorion and has an allantois a mammal, bird, or reptile.

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Jordan~ an animal whose embryo develops in an amnion and chorion and has an allantois a mammal, bird, or reptile.

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Why is the gait significant - Because it is distinctly different from how the humans of today walk, and may show the original version that eventually changed into versions more similar to mammals today, possibly to provide or allow more speed, or eliminate the slight sideways drift from this walk.

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we can tell from the tracks the general shape of the animals foot before it decayed and estimate its weight

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These animals would have lived during the carboniferous period. there would have been many forms of (proto)-reptilian and insect life, as well as various plants. Dinosaurs would not evolve for another ~100 million years or so (240mya)!

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We can tell the the animal that walked and made those fossils travels with the same motions as a salamander, so its likely they share the same traits, could a salamander be some sort of descendant, or an evolved version of said animal?

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We can tell how the thing walked, the pattern it walked in and how fast it was going.
We cannot tell what exactly it was, we just know it had similar characteristics to other animals
The animals gait is significant because it walked very similar to the common animals we know and have now
An amniote is an animal that lays hard shelled eggs. we can tell that it is an amniote because of the similarity to the current amniotes we know now.
i our ancestors must have came from or were amniotic reptiles.

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Jordan~  The animals gait is important because it is the movement of the limbs. So like speed and move around.

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Jordan~  The animals gait is important because it is the movement of the limbs. So like speed and move around.

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we can tell how the animal walked, what kind of pattern it was walking in, and the speed of the animal
an amniote is an animal that lays hard shelled eggs on land
The animal probably lived somewhere with a lot of dust and rocks

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Scientists can get a better understanding of how the creature may have moved/walked while it was alive via footprints- in this case, like a modern-day lizard. We cannot tell what the owner of the footprints looked like- we only see the bottom of it's feet. The gait is significant because we could track it's descendants to a modern-day animal. An amniote is a reptile, bird, or mammal that has eggs either hatched on land or retained inside a womb. We can tell this creature was an amniote because it walked like a modern lizard.

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The dinosaur had a similar to gait to a salamander which may mean they're related. Back then there were amniotes more specifically early reptiles, but there wasn't any snakes or geckos like we have now.

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I think that at this time our ancestors were in the early stages of evolution if they existed at this time at all.

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1. We know that the animal walks diagnol, it must have lived somewhere near water and sand.
2. We can't tell what's it body looked like only its feet.
3. An amniote is a hard-shell-egg-laying animal, and we can tell from the tracks maybe because of the way it walks.  They are assuming because they are near the water.
4. I think it might have been one of our ancestors.
5. Since this was before the dinosaurs maybe there were still the transition species that could go in water and on land.

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We can tell how it walked and how long it lived for (supposedly is the oldest fossil in the grand canyon). An amniote is an egg laying animal

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1. We can tell how fast the animal moved, how it walked, we can also tell it lived in an area where it had rained because the tracks were made when it rained.
2. We can't tell what the species ate, or how it looked like above the feet.
3. The way it walks is significant because that is very different from how a lot of species walk and that today the way many species walk could be an evolved form of that species gait.
4. An amniotic species is a hard-shell egg laying species and maybe from where they found the tracks they could tell its an amniote.
5. Our ancestors could've been very similar to the said species
6. Some reptiles were around that time or some sort of reptile like species was around that time.

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Our ancestors were in the earlier stages and was most likely able to give more accurate conclusions on these animals. Scientists today can figure out how they walk, figure out their size , etc.

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We can tell that it walked on all fours like your average salamander . We cant tell what was the exact breed of the animal. this is significant because it is a unknown fossils so that means we don't know what it is. A amniote is a type of animal that is born in a hard shell.

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Dr. Shenk - It lived a very long time ago when the area of the grand canyon was closer to sea level and some of the surrounding areas were coastline.  It may have been a desert whether this animal lived.

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Dr. Shenk - It lived a very long time ago when the area of the grand canyon was closer to sea level and some of the surrounding areas were coastline.  It may have been a desert whether this animal lived.

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Amniote: an animal whose embryo develops in an amnion and chorion and has an allantois; a mammal, bird, or reptile.

Amnion: the innermost membrane that encloses the embryo of a mammal, bird, or reptile.

Chorion: the outermost membrane surrounding an embryo of a reptile, bird, or mammal. In mammals (including humans), it contributes to the formation of the placenta.

Alantois: the fetal membrane lying below the chorion in many vertebrates, formed as an outgrowth of the embryo's gut. In birds and reptiles it grows to surround the embryo; in eutherian mammals it forms part of the placenta.

Because both humans and this apparent reptile are amniotes, and while the development of the embryo is different for both, both have similarities. The biggest difference however, is that the allantois develops as a membrane to surround the embryo in reptiles like this dinosaur, while in humans it develops to form the placenta. This is useful, because it could help us understand how it was that human fetal development evolved.

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What can we tell about the animal that made these tracks from this fossil?

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What can we tell about the animal that made these tracks from this fossil?

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What can't we tell?

Why is the animal's gait significant?

What's an amniote and how do you think they can tell from the tracks that it's an amniote?

What do you think can be said about our ancestors at the time this animal left the tracks?

What other forms of life were there at that time?  What kinds of organisms can we see today that we wouldn't have seen then?